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Freebase(0.00 / 0 votes)Rate this definition: Log flume. A log flume is a flume specifically constructed to transport lumber and logs down mountainous terrain to a sawmill by using flowing water. These watertight trough-like channels could be built to span a long distance across chasms and down steep mountain slopes.
This lichen helps determine the air quality, so one can assume that with little to no lichen on trees, the quality of the air in the Banff National Park is very low. In the biome the lichen is not very populous due to pollution and deforestation. Methuselah's Beard lichen is an essential factor in the Banff region of the boreal forest because it contributes to good air quality.